Question

I have a database with posts in it, to make it simpler, say I have two fields “user” and “rate”. I want to select all of the ratings from all of the posts by user: “Joe” and add them together and display them. Then I want to do the same with the other users, to produce a leaderboard.
I do not know the names of the users in the database.

Answer 1

The query below produce only one result which is the totalrate for user JOE

SELECT SUM(Rate) totalRate
FROM tableName
WHERE user = 'joe'

this one will show the user with the greatest rate because it was sorted based on the totalRate in descending order

SELECT user, SUM(rate) totalRate
FROM tableName
-- WHERE user = 'JOE'
GROUP BY user
ORDER BY totalRate DESC